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Home / Products / Automotive Steel Tubes / Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21
Quality Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21 factory
Quality Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21 factory
Quality Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21 factory
Quality Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21 factory
Quality Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21 factory

Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21

Basic Properties
Place of Origin: China
Brand Name: Torich
Certification: ISO 9001 ISO14001
Model Number: ASTM A534
Trading Properties
Minimum Order Quantity: 1 ton
Price: negotiable
Payment Terms: L/C, T/T
Tags

low carbon steel pipe

steel mechanical tubing

low carbon steel tube
Product Summary
Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21 Carburizing Steels for Anti-Friction Bearings Size:OD 4-520mm WT 0.5-50mm L:3-6m Application:Bear Chemical Composition Number C Name C Mn P (max) S (max) Si Cr Ni Mo Cu (max) O (max)D Al (max) . . . 4118H 0.17 -0.23 0.60 -1.00 ...

Product Details

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low carbon steel tube

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low carbon steel pipe
Product Description

Carburizing Seamless Type Automotive Steel Tubes ASTM A534 Grade B20 B21

 

Carburizing Steels for Anti-Friction Bearings

 

Size:OD 4-520mm WT 0.5-50mm L:3-6m

Application:Bear

 

Chemical Composition
 Number C Name C  Mn  P (max)  S (max)  Si  Cr  Ni  Mo  Cu (max)  O (max)D Al (max) 
. . .  4118H  0.17 -0.23  0.60 -1.00  0.025 0.015 0.15 -0.35  0.30 -0.70  . . .  0.08 -0.15  0.3 0.002 0.05
. . .  4320H  0.17 -0.23  0.40 -0.70  0.025 0.015 0.15 -0.35  0.35 -0.65  1.55 -2.00  0.20 -0.30  0.3 0.002 0.05
. . .  4620H  0.17 -0.23  0.35 -0.75  0.025 0.015 0.15 -0.35  . . .  1.55 -2.00  0.20 -0.30  0.3 0.002 0.05
. . .  4720H  0.17 -0.23  0.45 -0.75  0.025 0.015 0.15 -0.35  0.30 -0.60  0.85 -1.25  0.15 -0.25  0.3 0.002 0.05
. . .  4817H  0.14 -0.20  0.30 -0.70  0.025 0.015 0.15 -0.35  . . .  3.20 -3.80  0.20 -0.30  0.3 0.002 0.05
. . .  4820H  0.17 -0.23  0.40 -0.80  0.025 0.015 0.15 -0.35  . . .  3.20 -3.80  0.20 -0.30  0.3 0.002 0.05
. . .  5120H  0.17 -0.23  0.60 -1.00  0.025 0.015 0.15 -0.35  0.60 -1.00  . . .  . . .  0.3 0.002 0.05
. . .  8617H  0.14 -0.20  0.60 -0.95  0.025 0.015 0.15 -0.35  0.35 -0.65  0.35 -0.75  0.15 -0.25  0.3 0.002 0.05
. . .  8620H  0.17 -0.23  0.60 -0.95  0.025 0.015 0.15 -0.35  0.35 -0.65  0.35 -0.75  0.15 -0.25  0.3 0.002 0.05
. . .  9310H  0.07 -0.13  0.40 -0.70  0.025 0.015 0.15 -0.35  1.00 -1.45  2.95 -3.55  0.08 -0.15  0.3 0.002 0.05
B20  20Cr3  0.17 -0.23  0.60 -1.00  0.025 0.015 0.40 max  0.60 -1.00  . . .  . . .  0.3 0.002 0.05
B21  20Cr4  0.17 -0.23  0.60 -0.90  0.025 0.015 0.40 max  0.90 -1.20  . . .  . . .  0.3 0.002 0.05
B22  20MnCr4-2  0.17 -0.23  0.65 -1.10  0.025 0.015 0.40 max  0.40 -0.75  . . .  . . .  0.3 0.002 0.05
B23  17MnCr5  0.14 -0.19  1.00 -1.30  0.025 0.015 0.40 max  0.80 -1.10  . . .  . . .  0.3 0.002 0.05
B24  19MnCr5  0.17 -0.22  1.10 -1.40  0.025 0.015 0.40 max  1.00 -1.30  . . .  . . .  0.3 0.002 0.05
B25  15CrMo4  0.12 -0.18  0.60 -0.90  0.025 0.015 0.40 max  0.90 -1.20  . . .  0.15 -0.25  0.3 0.002 0.05
B26  20CrMo4  0.17 -0.23  0.60 -0.90  0.025 0.015 0.40 max  0.90 -1.20  . . .  0.15 -0.25  0.3 0.002 0.05
B27  20MnCrMo4-2  0.17 -0.23  0.65 -1.10  0.025 0.015 0.40 max  0.40 -0.75  . . .  0.10 -0.20  0.3 0.002 0.05
B28  20NiCrMo2  0.17 -0.23  0.60 -0.95  0.025 0.015 0.40 max  0.35 -0.65  0.40 -0.70  0.15 -0.25  0.3 0.002 0.05
B29  20NiCrMo7  0.17 -0.23  0.40 -0.70  0.025 0.015 0.40 max  0.35 -0.65  1.60 -2.00  0.20 -0.30  0.3 0.002 0.05
B30  18CrNiMo7-6  0.15 -0.21  0.50 -0.90  0.025 0.015 0.40 max  1.50 -1.80  1.40 -1.70  0.25 -0.35  0.3 0.002 0.05
B31  18NiCrMo14-6  0.15 -0.20  0.40 -0.70  0.025 0.015 0.40 max  1.30 -1.60  3.25 -3.75  0.15 -0.25  0.3 0.002 0.05
B32  16NiCrMo16-5  0.14 -0.18  0.25 -0.55  0.025 0.015 0.40 max  1.00 -1.40  3.80 -4.30  0.20 -0.30  0.3 0.002 0.05

 

 

Inclusion Rating
Rating Units
Thin Series Heavy Series
A-2 1/2 A-1 1/2
B-2 B-1
C-1/2 C-1/2
D-1 D-1

 

 

Decarburrization and surface imperfections for coils anf bars for balls and rollers
size,in.(mm) Decarburization or Surface Imperfections per Side,max,in.(mm)
Hot-Rolled or Hot Rolled Annealed  Cold-Finished 
Through 0.250(6.35) 0.005(0.13) 0.003(0.08)
Over 0.250(6.35)-0.500(12.7),Incl 0.006(0.15) 0.004(0.10)
Over 0.500(12.7)-0.750(19.1),Incl 0.008(0.20) 0.006(0.15)
Over 0.750(19.1)-1.000(25.4),Incl 0.010(0.25) 0.008(0.20)

 

 

Decarburization and Surface Imperfections for Bars and Tubes
size,In.(mm) Decarburization or Surface Imperfections per Side,Max,in.(mm)
Hot-Rolled bars  Annealed  Cold-Finished 
Bars Tubes Bars Tubes
Through 1.000(25.4) 0.012(0.31) 0.015(0.38) 0.012(0.31) 0.012(0.31) 0.010(0.21)
Over 1.000(25.4)-2.000(50.8),Incl 0.017(0.43) 0.022(0.56) 0.020(0.51) 0.015(0.38) 0.014(0.36)
Over 2.000(50.8)-3.000(76.2),Incl 0.025(0.64) 0.030(0.76) 0.030(0.76) 0.025(0.64) 0.019(0.48)
Over 3.000(76.2)-4.000(101.6),Incl 0.035(0.89) 0.045(1.14) 0.035(0.89) 0.024(0.61)
Over 4.000(101.6)-5.000(127.0),Incl 0.055(1.40) 0.065(1.65) 0.040(1.02) 0.028(0.71)

Mr. Richard SHEN

Managing Director

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